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    <script type="text/javascript">
        // 编写函数 norepeat(arr) 去掉数组中的重复元素
        function norepeat(arr) {
            return Array.from(new Set(arr));
        }

        var arr = [1, 2, 3, 4, 5, 3, 6, 7, 3, 2];
        var result = norepeat(arr);

        console.log("原数组：", arr);
        console.log("去重后的数组：", result);
    </script>
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